1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004 Topspin Communications. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <sys/cdefs.h>
36 #include <linux/err.h>
37 #include <linux/seq_file.h>
38
39 struct file_operations;
40
41 #include <linux/debugfs.h>
42
43 #include "ipoib.h"
44
45 static struct dentry *ipoib_root;
46
format_gid(union ib_gid * gid,char * buf)47 static void format_gid(union ib_gid *gid, char *buf)
48 {
49 int i, n;
50
51 for (n = 0, i = 0; i < 8; ++i) {
52 n += sprintf(buf + n, "%x",
53 be16_to_cpu(((__be16 *) gid->raw)[i]));
54 if (i < 7)
55 buf[n++] = ':';
56 }
57 }
58
ipoib_mcg_seq_start(struct seq_file * file,loff_t * pos)59 static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
60 {
61 struct ipoib_mcast_iter *iter;
62 loff_t n = *pos;
63
64 iter = ipoib_mcast_iter_init(file->private);
65 if (!iter)
66 return NULL;
67
68 while (n--) {
69 if (ipoib_mcast_iter_next(iter)) {
70 kfree(iter);
71 return NULL;
72 }
73 }
74
75 return iter;
76 }
77
ipoib_mcg_seq_next(struct seq_file * file,void * iter_ptr,loff_t * pos)78 static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
79 loff_t *pos)
80 {
81 struct ipoib_mcast_iter *iter = iter_ptr;
82
83 (*pos)++;
84
85 if (ipoib_mcast_iter_next(iter)) {
86 kfree(iter);
87 return NULL;
88 }
89
90 return iter;
91 }
92
ipoib_mcg_seq_stop(struct seq_file * file,void * iter_ptr)93 static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
94 {
95 /* nothing for now */
96 }
97
ipoib_mcg_seq_show(struct seq_file * file,void * iter_ptr)98 static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
99 {
100 struct ipoib_mcast_iter *iter = iter_ptr;
101 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
102 union ib_gid mgid;
103 unsigned long created;
104 unsigned int queuelen, complete, send_only;
105
106 if (!iter)
107 return 0;
108
109 ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
110 &complete, &send_only);
111
112 format_gid(&mgid, gid_buf);
113
114 seq_printf(file,
115 "GID: %s\n"
116 " created: %10ld\n"
117 " queuelen: %9d\n"
118 " complete: %9s\n"
119 " send_only: %8s\n"
120 "\n",
121 gid_buf, created, queuelen,
122 complete ? "yes" : "no",
123 send_only ? "yes" : "no");
124
125 return 0;
126 }
127
128 static const struct seq_operations ipoib_mcg_seq_ops = {
129 .start = ipoib_mcg_seq_start,
130 .next = ipoib_mcg_seq_next,
131 .stop = ipoib_mcg_seq_stop,
132 .show = ipoib_mcg_seq_show,
133 };
134
ipoib_mcg_open(struct inode * inode,struct file * file)135 static int ipoib_mcg_open(struct inode *inode, struct file *file)
136 {
137 struct seq_file *seq;
138 int ret;
139
140 ret = seq_open(file, &ipoib_mcg_seq_ops);
141 if (ret)
142 return ret;
143
144 seq = file->private_data;
145 seq->private = inode->i_private;
146
147 return 0;
148 }
149
150 static const struct file_operations ipoib_mcg_fops = {
151 .owner = THIS_MODULE,
152 .open = ipoib_mcg_open,
153 .read = seq_read,
154 .llseek = seq_lseek,
155 .release = seq_release
156 };
157
ipoib_path_seq_start(struct seq_file * file,loff_t * pos)158 static void *ipoib_path_seq_start(struct seq_file *file, loff_t *pos)
159 {
160 struct ipoib_path_iter *iter;
161 loff_t n = *pos;
162
163 iter = ipoib_path_iter_init(file->private);
164 if (!iter)
165 return NULL;
166
167 while (n--) {
168 if (ipoib_path_iter_next(iter)) {
169 kfree(iter);
170 return NULL;
171 }
172 }
173
174 return iter;
175 }
176
ipoib_path_seq_next(struct seq_file * file,void * iter_ptr,loff_t * pos)177 static void *ipoib_path_seq_next(struct seq_file *file, void *iter_ptr,
178 loff_t *pos)
179 {
180 struct ipoib_path_iter *iter = iter_ptr;
181
182 (*pos)++;
183
184 if (ipoib_path_iter_next(iter)) {
185 kfree(iter);
186 return NULL;
187 }
188
189 return iter;
190 }
191
ipoib_path_seq_stop(struct seq_file * file,void * iter_ptr)192 static void ipoib_path_seq_stop(struct seq_file *file, void *iter_ptr)
193 {
194 /* nothing for now */
195 }
196
ipoib_path_seq_show(struct seq_file * file,void * iter_ptr)197 static int ipoib_path_seq_show(struct seq_file *file, void *iter_ptr)
198 {
199 struct ipoib_path_iter *iter = iter_ptr;
200 char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
201 struct ipoib_path path;
202 int rate;
203
204 if (!iter)
205 return 0;
206
207 ipoib_path_iter_read(iter, &path);
208
209 format_gid(&path.pathrec.dgid, gid_buf);
210
211 seq_printf(file,
212 "GID: %s\n"
213 " complete: %6s\n",
214 gid_buf, path.pathrec.dlid ? "yes" : "no");
215
216 if (path.pathrec.dlid) {
217 rate = ib_rate_to_mult(path.pathrec.rate) * 25;
218
219 seq_printf(file,
220 " DLID: 0x%04x\n"
221 " SL: %12d\n"
222 " rate: %*d%s Gb/sec\n",
223 be16_to_cpu(path.pathrec.dlid),
224 path.pathrec.sl,
225 10 - ((rate % 10) ? 2 : 0),
226 rate / 10, rate % 10 ? ".5" : "");
227 }
228
229 seq_putc(file, '\n');
230
231 return 0;
232 }
233
234 static const struct seq_operations ipoib_path_seq_ops = {
235 .start = ipoib_path_seq_start,
236 .next = ipoib_path_seq_next,
237 .stop = ipoib_path_seq_stop,
238 .show = ipoib_path_seq_show,
239 };
240
ipoib_path_open(struct inode * inode,struct file * file)241 static int ipoib_path_open(struct inode *inode, struct file *file)
242 {
243 struct seq_file *seq;
244 int ret;
245
246 ret = seq_open(file, &ipoib_path_seq_ops);
247 if (ret)
248 return ret;
249
250 seq = file->private_data;
251 seq->private = inode->i_private;
252
253 return 0;
254 }
255
256 static const struct file_operations ipoib_path_fops = {
257 .owner = THIS_MODULE,
258 .open = ipoib_path_open,
259 .read = seq_read,
260 .llseek = seq_lseek,
261 .release = seq_release
262 };
263
ipoib_create_debug_files(if_t dev)264 void ipoib_create_debug_files(if_t dev)
265 {
266 struct ipoib_dev_priv *priv = dev->if_softc;
267 char name[IFNAMSIZ + sizeof "_path"];
268
269 snprintf(name, sizeof name, "%s_mcg", if_name(dev));
270 priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
271 ipoib_root, dev, &ipoib_mcg_fops);
272 if (!priv->mcg_dentry)
273 ipoib_warn(priv, "failed to create mcg debug file\n");
274
275 snprintf(name, sizeof name, "%s_path", if_name(dev));
276 priv->path_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
277 ipoib_root, dev, &ipoib_path_fops);
278 if (!priv->path_dentry)
279 ipoib_warn(priv, "failed to create path debug file\n");
280 }
281
ipoib_delete_debug_files(if_t dev)282 void ipoib_delete_debug_files(if_t dev)
283 {
284 struct ipoib_dev_priv *priv = dev->if_softc;
285
286 if (priv->mcg_dentry)
287 debugfs_remove(priv->mcg_dentry);
288 if (priv->path_dentry)
289 debugfs_remove(priv->path_dentry);
290 }
291
ipoib_register_debugfs(void)292 int ipoib_register_debugfs(void)
293 {
294 ipoib_root = debugfs_create_dir("ipoib", NULL);
295 return ipoib_root ? 0 : -ENOMEM;
296 }
297
ipoib_unregister_debugfs(void)298 void ipoib_unregister_debugfs(void)
299 {
300 debugfs_remove(ipoib_root);
301 }
302